Evaporator unit



2 Sheets-Sheet 1 INVENTOR Y March 9, E943.. E. E.' ALLYNE yEVAPQRATOR UNIT original Filed Jan. 3, 1938 Mam 9, g. I E E, ALLYNE l 2,313,499

EVAPORATOR UNIT AOriginal Filed Jan. 3, 1958 2 Sheets-Sheet 2 ZO INVENTOR )E E ALL xm:

raie-sie Mar. c, ieee ETE@ STA 'TE EVAPORTOR UNITE .Edmund 1r. ne, cleveland, omo, assis-nor to Allyne Laboratories, llnc., Cleveland, Ohio Original application January 3, i938, Serial No.

183,042. Divided and this application September 2l., i939, Serial No. 295,973

l Claim. (Cl. (i2-95) frigerant supply legs and freezing coils extending into the food compartment of the refrigerating apparatus.

One object of the invention is the provision of an evaporator unit which is individually heat insulated from the remainder of the refrigerating apparatus and so arranged that the evaporator storage chamber which heats up at the end of the refrigeration cycle will be prevented from conveying heat into the food compartment.

Another object of the invention is to arrange the food compartment freezing coils or loops so that they will be insulated around their bases or points of contact with the refrigerant supply legs in such a. manner that only the bare uninsulated sections of the freezing coils will extend into the food compartment. 1

A still further object isto provide a drain tube for the evaporator supply legs which is also heat insulated from the food compartment, and excoil back to the generator portion ofthe-refrigerating apparatus.

In the drawings,

Fig. 1 is a side elevation of anabsorption refrigerating apparatus showing the evaporator and freezing coils encased in insulation;

Fig. 2 illustrates the refrigerating apparatus partly in dotted lines within a cabinet showing the location of the parts after assembly;

Fig. 3 is a fragmental front View partly in cross section and partly in dotted lines showing the refrigerant supply '..gs and freezing coils within the food compartment;

Fig. 4 is an enlarged fragmentalvertical cross section showing the evaporator supply chamber, supply legs and freezing coils taken on line 4-4 of Fig. 3; and

Fig. 5 is a detail of the rear wall of the food compartment showing the manner in which the freezing coils are introduced into the food compartment.

' In Fig. 1 there is illustrated an absorption ref frigeration apparatus including generally -a generator-absorber l, condenser 2 and evaporator supply chamber 3. These several pieces of apparatus are properly connected by means of suitable conduits and with the exception of the evaporator form no part of the present invention. The details of construction of the apparatus as a whole, together with the operation of the system, are fully described in my copending application,

`Serial No. 183,042, now Patent No. 2,177,796,

dated October 31, 1939.

The top evaporator `supply chamber 3 is provided with one or more depending conduits or f supply legs 4 which may be slightly oiset to avoid Vtends from below the level of the lowest freezing f the top corner 5 of the food compartment lli of the refrigerator. A plurality of horizontal freezing coils or loops 6 extend outwardly from verti-l cally spaced positions on the supply legs for the circulation of refrigerant liquid to provide heat exchange within the food compartment I0 vand remove latent heat therefrom. The spaced laterally extending freezing coils 6 extend into the food compartment l0 from the supply legs 4 through a block of suitable insulating material l and are positioned in the food compartment by plate 8 which is joined to the rear wall of the food compartment. This plate and supporting means for the apparatus are disclosed and claimed in my copending application, Serial No. 183,042.

A drain tube 49 for removing water and refrigerant from the lower portion of the depending supply legs is carried on the insldeoi one of the legs and leads back to the lgenerator-abscrber. The operation of the drain per se is not a part of the present invention, although the combination with the evaporator unit and its location within the down leg insulation from the food compartment is a feature of this invention.

As shown `in Fig. 4, the opening in the lower part of the drain tube 9 extends to below thev lowest of the freezing coilsso that any water entrapped in the evaporator unit collects in the bottom sump portion of the down leg and will be cleared when thedrain functions.

'I'he block of insulation 1 surrounding the evaporator chamber 3, down legs 4, drain 9 and junction of the freezing coils 6 with the down legs is ,a unitary structure and assumes somewhat an inverted l`. formation and when assembled abuts the top and rearwall of the food compartment (See Fig. 1.) f

served that the insulation around these parts is separate from the remainder ofthe insulation surrounding the other portions of the food compartment and thus the entire refrigeratingapparatus together with the evaporator unit may be withdrawn from the food compartment and refrigerat- `and gas therein ing casing, as described and claimed in my copending application, Serial No. 183,042.

This construction completely blocks heat loss from the evaporator chamber and down legs and prevents heat from these parts leaking into and heating up the food compartment, inasmuch as the only portion of the evaporator unit exposed cabinet. said assembly comprising a tubular r frigerant storage chamber lying parallel to the front of the said cabinet and.having depending supply conduits connected thereto and a plurality of vertically spaced, horizontal freezing tubes connected to said supply conduits, the said evaporator assembly being independently insulated from said food compartment by a mass of material deeply surrounding said storage chamber and'said supply conduits in such a manner that the only direct heat transfer to said compartment is through the medium of said plurality of vertically spaced, horizontal freezing tubes.

EDMUND E. ALLYNE. 

